To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Condition: The coin has a condition of 95 (EF+), indicating that it is in very good shape. This generally increases its value compared to coins with lower conditions.

2. Previous auction prices: By looking at previous hammer prices for coins with a similar condition (95), we see that:
- In 2020, it was auctioned for 3000 and 3800 euros.
- In 2022, it was auctioned for 1700 euros (with a condition of 70, which is lower).
- In 2023, it was auctioned for 7000 euros, indicating a significant increase in interest or value for the coin.

3. Starting price and average hammer price: The current starting price is 3000 euros, and the average hammer price for this coin is 2695.1 euros. However, the hammer price may vary depending on demand at the auction.

4. Auction trends: The coin has been auctioned 24 times, of which 22 have been sold. This suggests there is consistent interest in the coin.

5. Previous price estimates: Estimated prices in previous auctions for coins with a condition of 95 have been up to 4500 euros.

Taking all these factors into account, an estimated maximum purchase price could be between 4500 and 5000 euros, as this range reflects both the interest in the coin and its condition, as well as previous hammer prices. However, it is important to consider that the final price will depend on the competition at the auction and the demand at that time.